diff options
| -rw-r--r-- | drivers/scsi/scsi_debug.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/drivers/scsi/scsi_debug.c b/drivers/scsi/scsi_debug.c index 2f39b13c7130..01c0ffa31276 100644 --- a/drivers/scsi/scsi_debug.c +++ b/drivers/scsi/scsi_debug.c @@ -1997,8 +1997,14 @@ static unsigned long lba_to_map_index(sector_t lba) static sector_t map_index_to_lba(unsigned long index) { - return index * scsi_debug_unmap_granularity - - scsi_debug_unmap_alignment; + sector_t lba = index * scsi_debug_unmap_granularity; + + if (scsi_debug_unmap_alignment) { + lba -= scsi_debug_unmap_granularity - + scsi_debug_unmap_alignment; + } + + return lba; } static unsigned int map_state(sector_t lba, unsigned int *num) |